Laboratory Hot Plates

Laboratory Hot Plates

hot plates

Multiple Unit Electric Hot Plates

HOT PLATE, Electric, Multiple Unit, Improved-Provided with three snap switches mounted on the base each of which controls one of three heating coils. At each of the three heats, even temperature is obtained over the whole of the top surface. Each heater is wired to operate on either 110 or 220 volts. The change from one voltage to another is made by shifting the con­nections. The sizes listed will give the following temperatures, when used on either 110 or 220 volts:

  • Maximum                                   750°  F. or  400° C.
  • Medium                                      600°  F. or  315°  C.
  • Low                                            400°    F.  or 205° C.

If a 110-volt supply is available, three additional heats may be obtained by connecting the hot plate for 220-volt operation and using it on the 110-volt supply. The temperatures would then be:

  • Maximum                                  360°  F. or 180° C.
  • Medium                                      240°  F. or 116° C.
  • Low                                             160°  F.  or  71°  C.

Each hot plate is supplied with 6 feet of connecting leads and instruction card.

hot plate gas

HOT PLATE, Gas—With extra heavy, highly polished top, black japan finish. The proper spacing placing and improved type of burners provide for an evenly heated surface, free from cold spots.

hot plates

HOT PLATE, Electric—Disc stove; controlled by a three-heat snap switch. With cast iron top and pressed  steel base. The eight inch size requires direct wiring.

JAR, Cylindrical, Pyrex Glass—Plain. Heavily constructed for general use.


HEATER, Precision Electric—The clays of this heater are made of a high-heat porcelain, not affected by acids and chemicals used in the laboratory. The heater is regularly furnished with a bevel opening 3 7/8″ to 3¼”. It can also be supplied with opening 3 9/16″ to 3 1/8″ if so specified in order. A very sensitive rheostat is a component part of the heater. The resistance is varied by moving a knob along a graduated scale, reading from 0 to 100 in fifths. This sensitive con­trol enables the user to accurately duplicate temperature conditions. The total resistance of the rheostat coils for 110-volt heater is 18 ohms. Size, 5x5x8 ‘inches. Weight, 6½ pounds. Packed in individual cartons. Wound for 550 to 600 watts.